The Washer,flat, cataloged under National Stock Number 5310-01-203-2653, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Apollo Aerospace. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-203-2653 |
| Primary Part Number | A3013124-4 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Apollo Aerospace |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 9.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 AND STEEL COMP 302 AND STEEL COMP 303 AND STEEL COMP 303SE AND STEEL COMP 304 AND STEEL COMP 304L AND STEEL COMP 305 AND STEEL COMP 308 AND STEEL COMP 309 AND STEEL COMP 309S AND STEEL COMP 310 AND STEEL COMP 310S AND STEEL COMP 314 AND STEEL COMP 316 AND STEEL COMP 316L AND STEEL COMP 317 AND STEEL COMP 321 AND STEEL COMP 347 AND STEEL COMP 348 AND STEEL COMP 384 AND STEEL COMP 385 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 4.3 MILLIMETERS NOMINAL MM |
| Thickness | 0.8 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A3013124-4 PRIMARY | Apollo Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 517702-4 | 5/9 Secondary reference L3harris Technologies, Inc. Dba Harris Corporation |
| D70342/1-043C | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| A3013124-4 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5310-01-203-2653 is a Washer,flat, manufactured by Apollo Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-203-2653 has 1 manufacturer part number on file: A3013124-4 (Apollo Aerospace).
Key specifications for A3013124-4: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 9.0 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.